I only have the Valais CD, but it comes with a 1:500,000 map of the whole country, which I find very useful for locating places that I read about. Hit Cntr-F and enter the place name and, presto, you get a map centered on that place! Sure, Google Earth or Google Maps can do the same, but this works without the longish download times.

On a different note: The SwissTopo web site has been restructured, and every bloody URL is broken, as you can confirm by clicking on the link in the quote Current link is SwissMap 25.